I am Confused with ddr sdram memory??

[tonyxd]

hello i want to upgrade my computer ram memory 1 GB TO 2 GB
its and hacer aspire SE360-UA421M

BUT I AM CONFUSED AN DONT NOW WICH MODULE IS THE MEMORY exacty i was going to buy a
PNY OPTIMA 1GB DDR 400 MHz PC3200 Desktop DIMM Memory but there is a line to put the memory my computer ram haves it in the middle but others ddr sdrams have it in a side??

i am realy confused?
i realy appreciate your help!

 

[nikorr]

What is the PC model?

acer aspire SE360-UA421M has no results.

 

[tonyxd]

dont worry i buy already the ram THANK YOU SO MUCH!

 

[nikorr]

Okey-dokey.